How to Use a Scientific Calculator
A scientific calculator extends beyond basic arithmetic to include trigonometric functions, logarithms, square roots, and powers. Whether you are studying maths, physics, engineering, or just need to solve complex calculations, this tool provides everything a physical scientific calculator offers, right in your browser.
How to Use This Calculator
- Select your angle mode — DEG (degrees) or RAD (radians) — by clicking the mode buttons above the display. Most everyday calculations use degrees.
- Build your expression by clicking the number and operator buttons. The expression appears in the display as you go.
- Use scientific functions like sin, cos, tan, log, ln, and square root by clicking them. Functions like sin expect a number to follow.
- Press equals to evaluate your expression. The result appears in the main display and the expression moves to the smaller line above.
How It Works
The calculator builds a mathematical expression as a string and evaluates it using JavaScript's built-in math engine. Trigonometric functions automatically convert between degrees and radians based on your selected mode. The log button computes the common logarithm (base 10) and ln computes the natural logarithm (base e). The x-squared button squares the current expression, and the square root button wraps the expression in a square root function. Parentheses are fully supported for controlling the order of operations. All processing runs locally in your browser with no data sent to any server.
Frequently Asked Questions
How do I use the scientific calculator?
Click the number and operator buttons to build your expression, then press the equals button to calculate. You can also use the scientific functions like sin, cos, tan, log, and ln by clicking those buttons before entering a number.
What is the difference between DEG and RAD mode?
DEG mode treats angles in degrees (a full circle is 360 degrees) while RAD mode treats angles in radians (a full circle is 2 pi radians). Most everyday calculations use degrees, while radians are standard in mathematics and physics.
How do I calculate square roots?
Click the square root button followed by the number, or type the number first and then click the square root button. For example, to find the square root of 144, enter 144 and click the square root button to get 12.
Can I use parentheses for order of operations?
Yes, the calculator fully supports parentheses. Use the open and close parenthesis buttons to group calculations. The calculator follows standard mathematical order of operations (BODMAS/PEMDAS).
What does the ln button do?
The ln button calculates the natural logarithm (base e, where e is approximately 2.71828). It is the inverse of the exponential function. For example, ln(e) equals 1 and ln(1) equals 0. Natural logarithms are widely used in science and engineering.
What is the difference between log and ln?
The log button calculates the common logarithm (base 10), while ln calculates the natural logarithm (base e). For example, log(100) equals 2 because 10 squared is 100, while ln(100) equals approximately 4.605.
